Convert to inline json

#!/usr/bin/env bash
# Usage: ./html-to-json.sh input.html
# Prints a JSON-escaped, single-line string (with quotes) suitable
# for pasting as a value into a JSON localization file.
#
# Requires: jq

set -euo pipefail

if [[ $# -lt 1 ]]; then
echo "Usage: $0 <input.html>" >&2
exit 1
fi

input_file="$1"

if [[ ! -f "$input_file" ]]; then
echo "File not found: $input_file" >&2
exit 1
fi

# Collapse all whitespace/newlines into single spaces (matches the
# single-line style already used in Localization.*.json), then JSON-encode.
tr '\n' ' ' < "$input_file" | tr -s '[:space:]' ' ' | sed -e 's/^ *//' -e 's/ *$//' | jq -Rs .